There's no shortage of world-class beauty spots in London, whether your look is posh, pretty, polished, or punk. The challenge, of course, is scouring 609 square miles to track down the best spas, salons, and shops. So we asked some of our favorite Britons — and a few Anglophiles, too — to let us in on their favorite beauty spots. Here's the best from supermodels to makeup artists to fashion designers.